A good product to allow you to fit a 15mm thru axle fork to your fork mounted roof rack. I prefer the fork mounted style because the bikes don't wobble around as much as other systems.Its pitty they don't do a lockable 15mm thru axle connection on bike carriers.With this adapter the connection to the rack needs to be tight and the rear wheel needs to be secure because the adapter can roll forward with heavy braking.

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Description:
Rocky Mounts Locking Driveshaft Nowadays, most modern mountain
bikes use thru-axle forks, which is great on the trail, although it raises some questions when hooking your bike up to your car rack. RockyMounts DriveShaft is a 15mm/20mm thru axle adapter ...